save project

my_tree.py

@@ -11,14 +11,16 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-def tree(n)
+def tree(n):
     if n>=50:
         pen.forward(n)
         pen.right(30)
         tree(n-10)
+        pen.left(60)
+        tree(n-10)
         pen.right(30)
         pen.up
         pen.backward(n)
-        pen.down
- tree(100)
+        pen.down()
+tree(100)
 turtle.done()